I am a pakistani citizen now in CHINA and have valid visa for Hong Kong can i go Macao without visa?

You have to obtain a Macau visa in advance to go to Macau for pleasure. The valid Hong Kong visa only permits to visit Hong Kong. It is impossible for you to get Macau visa in China. I'm afraid that you have to give up your trip to Macau. If you really want to go to Macau, you can try to get a visa on arrival in Macau by showing your valid Hong Kong visa and China visa (in principla, Pakistani citizen are not allowed to get visa on arrival in Macau)